GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1"

The GROCO Stainless Steel Hose Barb Thru-Hull Fitting - 1" is the backbone of any reliable marine water system, whether you're running through-hull drain lines, raw water intakes, or discharge applications on fishing boats and cruisers. Built to handle years of saltwater exposure and the constant pressure cycling that comes with extended time on the water, this thru-hull fitting eliminates the corrosion failures and leaks that plague inferior brass or low-grade stainless alternatives. If you've ever dealt with a failed through-hull fitting in rough seas, you understand why GROCO's reputation matters—this fitting delivers the durability and peace of mind serious boaters demand.

Constructed from #316 stainless steel, this hose barb thru-hull fitting resists corrosion far better than standard 304 stainless, making it ideal for saltwater environments where galvanic action and chloride exposure are constant threats. The 1" hose connection accepts standard marine hose with a secure barb design that prevents slip-offs under pressure, while the NPS (National Pipe Straight) thread with hose connection allows straightforward installation into your hull. UL Listed to standard 647B, the fitting meets marine electrical safety requirements and carries the third-party certification that insurance companies and marine surveyors recognize. The compact 3 x 3 x 4-inch footprint and lightweight 0.65-pound construction make it easy to route through tight engine compartments and equipment spaces without sacrificing structural integrity.

Anglers, livewell operators, and bluewater cruisers rely on GROCO fittings because they stand up to continuous saltwater immersion where budget alternatives fail within seasons. This 1" fitting works with standard marine hose clamps and most through-hull installations on center consoles, cabin cruisers, and fishing vessels rated for 1-inch plumbing systems. Whether you're replacing a failed fitting or upgrading an older boat's through-hull infrastructure, the #316 stainless construction ensures you won't be replacing this component again—making it the cost-effective choice for serious boat owners who value reliability over repeated repairs.